In view of such issue as weak dynamic response of repetitive control and the limit of restraining disturbance

a hybrid control strategy based on improved repetitive control and quasi proportional resonant（QPR）control is proposed in this paper. The feed forward and QPR control is used to eliminate the delayproblem and the steady accuracy issue of whole compound control is solved by the addition of proportionalcontrol. The voltage distortion in sudden on load and off load is suppressed and the design difficulty ofrepetitive control is reduced by the use of good disturbance resistance of QPR control. It is shown by theMATLAB simulation that the use of compound strategy keeps the periodic and sudden load disturbance suppressed well and both dynamic and disturbance resistance ability of the system improved.